Grant j



UNITED sTATEs PATENT oEEroE.

GRANT J. WHEELER, G. WV. DONNELL, AND WM. SHARP, OF BLOOMFIELD, NEWJERSEY, ASSIGNORS TO JAMES C. BEACH, OF SAME PLACE.

Specification of Letters Patent No.

To all whom it may concern:

Be it known that we, GRANT J. WHEELER, GEORGE IV. DoNNELL, and VILLIAMSHARP, of Bloomfield,` in the county of Essex and State of New Jersey,have invented certain new and useful Improvements in Press Rolls andFelts for Manufacturing Heavy Paper; and we do hereby declare that thefollowing is a full, clear, and exact description of the same, referencebeing had to the accompanying drawings, making a part of thisspecification, in which- Figure l is a perspective view showing thecombination and arrangement together of the press rolls and felts, andFig. 2 is a perpendicular section or end view of the same.

The same let-ters indicate like parts in both figures.

The nature and object of our invention is in a more thorouglrmanner thanhas heretofore been done to express the water from the pulp preparatoryto its being passed onto the drying rolls and at the same time tosubject it to a just and uniform pressure, thus rendering the paperproduced .from our press superior in quality as to uniformity, solidity,strength and weight.

In Fig's. l and 2, A, B, C, D, E, F, are the press rolls, the powerbeing communicated from B. rllhe small roll 77, shown next to A, in Fig.2, is introduced simply for the purpose of cleaning and tightening theendless feltv K, and is not material to our invention.

H, H, is the pulp, underneath which is the lower felt S, shown by ablack line in Figs. l and 2, but seen best in Fig. 2, and extending fromH, to H, through the whole distance of the press, the said felt S, beingthe same, except as to its arrangement, as heretofore described, as isused in all ordinary cylinder machines. The pulp, as shown in thedrawings, enters the press rolls at H, being drawn between and by thefelts K, and S, through the rolls, by the power at press roll B.

The roll D, is hollow, having its periphery perforated as shown in Fig.l.

The main felt S, underlying H, H, enters between the press rolls E, andF, in the ordinary manner and passes down and under- 31,215, datedJanuary 22, 1861.

neath the perforated roll D, wrapping tightly the roll D, thence passingbackward between the rolls C, and D, and over the roll C, thence throughor between the rolls A, and B.

K, is an endless felt lying on the top of the pulp H, H', and passingbetween the press rolls in the same manner as the main felt S, alreadydescribed, and which when issuing from between the rolls A, and B,returns over the rolls A, and E, in continuation of its circuit.

By means of the arrangement and combination described, we are enabled topress the water from a much heavier web of pulp, without crushing it,than can be accomplished by the ordinary process. This result we attainby the use of the perforated roll D, and the felt wrapping the same,which cause the water pressed from the web at the point of pressure,between C, and D, to run offv on the felts instead of pressing back onthe web as in the old process, and the felts, drawing the pulp tightlyon the perforated roll, cause during the whole distance of pressure thewater to pass into the perforated roll D. The endless felt K, running onthe top of the web (thus running the web between two felts) prevents thewater pressed from the web from washing the pulp as it passes betweenthe press rolls owinO to the water being pressed through the 'elt, andthence running off at either end, thus fully protecting the web.

The endless felt K, may be formed of felting, wire cloth or otherequivalent and suitable material.

that we claim as new and of our own invention and desire to secure byLetters Patent of the United States is The use in press rolls of theperforated roll D, in combination with the felts K, and S, which carrythe pulp between them, substantially in the manner and for the purposesdescribed.

GRANT J. WHEELER. GEORGE WV. DONNELL. WILLIAM SHARP.

fitnesses R. L. COOKE, J. M. IVHEELER.

